Short for Female Domination. The most wonderful form of BDSM. Unfortunately, it is made fun of in many movies.
The dominate one (Madame, Mistress, Domina, Dominatrix, Goddess) have complete control over the slave, such as:

-Whipping/Spanking
-Riding the slave like a pony
-Put leash and collar on the slave
-Facesitting
-Humiliate
-Bondage/Blindfold/Gag
-Penetrate with strap-on
-Make slaves lick boots
-Dress up slave like a maid,animal, etc.
-Use slave for sexual favors

Some (BAD) dominatrices use slaves as "money slaves", and make them pay for everything. Usually scammers.

Mostly used in sexual games, but some people also have a 24/7 relationship, where the Dominatrix is in charge of her slave/s all the time.

In other words; femdom is most of the time amazing. Check out OWK.cz (Other World Kingdom) for one of the better websites. Other examples are "Whipped Ass" and "Men In Pain".

The slave was having second thoughts about Femdom, as he was bending over, tied up, getting whipped and penetrated.

Literally female domination. Fem dom is when the female in the partnership is sexually in charge. Can be includedbondage, s&m and b&m. Often found with feet worship. The female, or dminatrix, can either be in charge of a male or a female. Fem Dom is popular in lesbian groups. Usually a butch dominates a skinnier, hotter girl. Tieing up, pussy play, pain, clamps, whips, and other toys are involved.